1999 Mercury Sable LS 6 Cyl 3.00L
Body & Interior
AC blows hot air only. The valve that selects AC or heater is ok. Unit not available at dealer.
My AC started blowing only hot air. The mechanic said that it was not the diverter box but rather the controler in the console. They could not find one as the Ford dealer said that the unit was discontinued.
Check partstrain.com or a junkyard.